The Skaven wizard selects a unit or area of terrain within 24". Flames suddenly consume the area. If the target is a unit, roll a D6 for each model: on a 6 it suffers 1 wound (saves apply normally). If the target is a flammable piece of terrain it will catch fire on 3+. Units can't enter burning terrain, and any models in burning terrain suffer a wound at the end of their movement phase. Roll for every fire at the start of the Skaven turn: 1-2 fire goes out; 3-4 fire continues; 5-6 fire will spread to another piece of flammable terrain within 6".